Transcript APPLYING GIS FUNCTIONS IN NRW REDUCTION ACTIVITIES Ir. Zainuddin Bin Md Ghazali Chief Operating Officer Ranhill Water Services Sdn Bhd 83, Matang Building, Jalan Langkasuka, 80350 Johor.

APPLYING GIS FUNCTIONS
IN
NRW REDUCTION ACTIVITIES
Ir. Zainuddin Bin Md Ghazali
Chief Operating Officer
Ranhill Water Services Sdn Bhd
83, Matang Building, Jalan Langkasuka,
80350 Johor Bahru, Malaysia.
Tel: 607 276 2020
HP: 6019 772 6611
email : [email protected]
Website: www.rws.com.my
What is NRW?
Non Revenue Water definition is quantity of water
produced from treatment plant not billed to
customer
NRW = System Input – Water billed
The formula
if
P=
System Input , C = Billed Consumption
P - C
= NRW %
P
C
P
RESERVOIR
* A measuring scale for Water Supply company efficiency
NRW in Johor (2002 - 2013)
39
Percentage
37
35
33
31
29
27
25
Infrastructure Leakage Index (ILI)
•
Calculation for ILI is;
CARL (Current Amount Real Loses)
UARL (Un-Avoidable Real Loses)
CARL = physical loses includes overflow, burst, and
leaks
UARL = (18 x Lm + 0.8 Nc + 25 Lp) Pr
Pr = Pressure. Avg retic and distr mains = 3.2 Bar.
Lm = Pipe length from GIS in meter.
Nc = Number of Billings connections.
Lp = Private length, or avg communication pipe in
meter.
PHYSICAL LOSSES TARGET MATRIX
Physical Loss Performance: Categories; Guide
to Further Action
A
Good: further
loss reduction
may be
uneconomic;
careful analysis
cost effective
improvements.
B
C
Potential for
marked
improvements:
Consider
pressure
management,
better active
leakage practices
and better
maintenance.
Poor: Tolerable
only if water is
plentiful and
cheap; even
then intensify
NRW reduction
efforts.
D
Terrible:
Inefficient use of
resources; NRW
reduction
programs
imperative and
priority.
Why NRW is very important to any water operator?
 To fully optimize usage of treated water
produced by consumers
 To optimize revenue
 Increase operational efficiency
Where do GIS functions benefit NRW Management?
In areas of:
 Water Asset Registration
 DMA establishment
 Network Modeling
 Planning & Operation
Where do GIS functions benefit NRW Management?
Water Asset Registration
Asset Registration : eliminate OUTDATED AND UNMAINTAINED
DATA
 Created once in Excel and no update after that
TACIT
JOHOR DIGITAL MAP &
PIPELINES
ASSET MEASUREMENT
Source : SAJH-GIS (Apr 2013)
Asset update progress over five (5) years
Measurement
Unit
Year 2006
Year 2010
% increase
Pipe Length
Km
15,114.20
19,191.12
27%
Valve
Unit
39,519
54,207
37%
Hydrant
Unit
24,033
36,117
50%
Air Valve
Unit
8,393
12,537
49%
Double Air Valve
Unit
4,848
13,953
188%
Water Sampling Point
Unit
861
933
8%
End Cap
Unit
4,623
6,514
41%
Customer supply point
Unit
46,164
501,103
985%
* Source of data courtesy of SAJ Holdings Sdn Bhd
GIS for Asset Registration
 Single point of reporting for water assets
 Avoid outdated and unmaintained data
Where do GIS functions benefit NRW reduction?
DMA Establishment
GIS for DMA establishment
Network Tracing to
locate valves to be
boundary valves for
DMA
DMZ – BW16
GIS for DMA establishment
DMZ polygon
Improved DMA boundaries and data value
* Source of data courtesy of SAJ Holdings Sdn Bhd
DMZ Conflict Inspector (DMZ-CI)
Conflict
output
Result – better analysis for NRW by DMA (case on zero
variance in number of connections
* Source of data courtesy of SAJ Holdings Sdn Bhd
Result – better analysis for NRW by DMA on commercial
losses
* Source of data courtesy of SAJ Holdings Sdn Bhd
GIS for DMA establishment
 To provide scale-down NRW analysis by
DMA
 Improve DMA boundary and data value
 Better analysis on commercial losses
 Leakage percentage and pressure
management
Where do GIS functions benefit NRW reduction?
Network Modeling
Hydraulic Modeling : tedious work in Excel and plotting
in hydraulic software
 Create in Excel and transfer to Model
Data transfer from GIS to Hydraulic Modeling Software
Laid on Google map
Result: Analysis on DMA pressure survey (High Pressure)
GIS for Network Modeling
 Avoid redrawing of data
 Data transfer from GIS to Modeling
software
 Model can be shown as layer-lapping
with GIS map/Google map
Where do GIS functions benefit NRW reduction?
Planning & Operation
Pipe burst record in GIS
GIS for Planning of Asset Replacement
GPS to locate burst
location and record in GIS
Burst location
Burst
Total
GIS for Planning of Asset Replacement
 Record of Asset
 Burst records
- for pipe replacement program
Planned Shut Down & Trace to Affected Customers Application
Record of customer
affected by water
disruption from billing
system
GIS for DMA Maintenance
 Opening/closing of valve: better
management on service interruption
during DMZ maintenance
- ZPT
- Step test
Challenges & lessons learned
 Be achieved with:
 High commitment from all staffs in the
company – from top to bottom
 Collaboration & Co-operations
 Willing to improve
 Rapid development environments, ease of use,
product reliability, and vendor stability are
among key contributors to selecting integrated
platform options
 Customer service/stakeholders’ interests must
be the key indicator – fulfill the needs and
efficient service
THANK YOU